UNITED STATES DEPARTMENT OF THE INTERIOR 
Harold L. Ickes, Secretary 
NATIONAL PARK SERVICE 
Arno B. Cammerer, Director 
+ 
PLANTS 
OF 
YELLOWSTONE NATIONAL PARK 
b y 
if 
W. B. McDOUGALL and HERMA A. BAGGLEY 
+ 
With Illustrations and Keys for Identification 
UNITED STATES 
GOVERNMENT PRINTING OFFICE 
WASHINGTON : 1936 
For sale by the Superintendent of Documents, U. S. Government Printing Office 
Washington 25, D. C. - Price 75 cents 
